In 2023, Keystone, SD had a population of 404 people with a median age of 37 and a median household income of $62,159. Between 2022 and 2023 the population of Keystone, SD grew from 385 to 404, a 4.94% increase and its median household income grew from $58,646 to $62,159, a 5.99% increase.
The 5 largest ethnic groups in Keystone, SD are White (Non-Hispanic) (73.3%), White (Hispanic) (15.8%), Two+ (Non-Hispanic) (6.93%), American Indian & Alaska Native (Non-Hispanic) (2.23%), and Other (Non-Hispanic) (0.743%).
None of the households in Keystone, SD reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
100% of the residents in Keystone, SD are U.S. citizens.
In 2023, the median property value in Keystone, SD was $188,800, and the homeownership rate was 67.4%.
Most people in Keystone, SD drove alone to work, and the average commute time was 29 minutes. The average car ownership in Keystone, SD was 3 cars per household.